package com.ruoyi.common.utils;

import org.apache.commons.codec.binary.Base64;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;

public class AesEncryptUtils {

    /**
     * 可配置到Constant中，并读取配置文件注入,16位,自己定义
     */
    private static final String KEY = "G0ZlS2g4Cqg@qgqg";
    public static final String KEY_FOR_APP = "APP|G0ZlS2g4Cqg#";


    /**
     * 参数分别代表 算法名称/加密模式/数据填充方式
     */
    private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";

    /**
     * 加密
     * @param content 加密的字符串
     * @param encryptKey key值
     * @return
     * @throws Exception
     */
    public static String encrypt(String content, String encryptKey) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));
        byte[] b = cipher.doFinal(content.getBytes("utf-8"));
        // 采用base64算法进行转码,避免出现中文乱码(URL安全的 ，防止特殊字符转义导致浏览器访问错误)
        String base64Str = Base64.encodeBase64URLSafeString(b);
        // 空格问题
        base64Str = base64Str.replace(" ", "+");
        return base64Str;

    }

    /**
     * 解密
     * @param encryptStr 解密的字符串
     * @param decryptKey 解密的key值
     * @return
     * @throws Exception
     */
    public static String decrypt(String encryptStr, String decryptKey) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
        // 采用base64算法进行转码,避免出现中文乱码
        byte[] encryptBytes = Base64.decodeBase64(encryptStr);
        byte[] decryptBytes = cipher.doFinal(encryptBytes);
        return new String(decryptBytes);
    }

    public static String encrypt(String content) throws Exception {
        return encrypt(content, KEY);
    }
    public static String decrypt(String encryptStr) throws Exception {
        return decrypt(encryptStr, KEY);
    }


    public static void main(String[] args) throws Exception {
        for(int i=0;i<100;i++){
            String content= "你好啊"+(i+1231);
            System.out.println("加密前：" + content);

            String encrypt = encrypt(content);
            System.out.println("加密后：" + encrypt);

            long start = System.currentTimeMillis();
            String decrypt = decrypt(encrypt);
            System.out.println("解密后：" + decrypt);
            System.out.println(System.currentTimeMillis() - start);
        }


    }
}
